<template>
  <div>
    <h1>App</h1>
    {{ count }} <button @click="count++">+</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      count: 100,
    };
  },
  methods: {
    add() {
      this.count++;
    }
  }
};
</script>